added arbitrary expression inversion, lookforward, and syntax for lookback

[sbp.git] / src / edu / berkeley / sbp / Repeat.java

diff --git a/src/edu/berkeley/sbp/Repeat.java b/src/edu/berkeley/sbp/Repeat.java
index 35f3477..3e9b2b6 100644 (file)
--- a/src/edu/berkeley/sbp/Repeat.java
+++ b/src/edu/berkeley/sbp/Repeat.java
@@ -20,18 +20,27 @@ public class Repeat extends Union {
     public  static Repeat many1(Element e)              { return new Repeat(e, false, true); }
     /** repeat one or more times, separated by <tt>sep</tt> */
     public  static Repeat many1(Element e, Element sep) { return new Repeat(e, false, true, sep); }
     public  static Repeat many1(Element e)              { return new Repeat(e, false, true); }
     /** repeat one or more times, separated by <tt>sep</tt> */
     public  static Repeat many1(Element e, Element sep) { return new Repeat(e, false, true, sep); }

-    public  static Maximal maximal(Element e)           { return new Maximal(e); }
+
+    /** repeat zero or more times, matching a maximal sequence of atoms */
+    public  static Repeat maximal0(Element e)              { return new Repeat(e, true, true, null, true); }
+    /** repeat one or more times, matching a maximal sequence of atoms */
+    public  static Repeat maximal1(Element e)              { return new Repeat(e, false, true, null, true); }
+    /** repeat one or more times, separated by <tt>sep</tt>, matching a maximal sequence of atoms */
+    public  static Repeat maximal1(Element e, Element sep) { return new Repeat(e, false, true, sep, true); }

 
     // Instance //////////////////////////////////////////////////////////////////////////////
     
     final boolean zeroOkay, manyOkay;
     final Element e;
     final Element separator;
 
     // Instance //////////////////////////////////////////////////////////////////////////////
     
     final boolean zeroOkay, manyOkay;
     final Element e;
     final Element separator;

+    final boolean maximal;

 
     Repeat(final Element e, boolean zeroOkay, boolean manyOkay) { this(e, zeroOkay, manyOkay, null); }
 
     Repeat(final Element e, boolean zeroOkay, boolean manyOkay) { this(e, zeroOkay, manyOkay, null); }

-    Repeat(final Element e, boolean zeroOkay, boolean manyOkay, Element separator) {
+    Repeat(final Element e, boolean zeroOkay, boolean manyOkay, Element separator) { this(e, zeroOkay, manyOkay, separator, false); }
+    Repeat(final Element e, boolean zeroOkay, boolean manyOkay, final Element separator, boolean maximal) {

         super(e+(!manyOkay ? "?" : (zeroOkay ? "*" : "+"))+(separator==null?"":("/"+separator.toString())), true);
         this.e = e;
         super(e+(!manyOkay ? "?" : (zeroOkay ? "*" : "+"))+(separator==null?"":("/"+separator.toString())), true);
         this.e = e;

+        this.maximal = maximal;

         this.zeroOkay = zeroOkay;
         this.manyOkay = manyOkay;
         this.separator = separator;
         this.zeroOkay = zeroOkay;
         this.manyOkay = manyOkay;
         this.separator = separator;

@@ -47,17 +56,6 @@ public class Repeat extends Union {
                 add(new Sequence.Unwrap(new Element[] { e, this.separator, Repeat.this }, new boolean[] { false, true, false }, null, null));
             }
         }
                 add(new Sequence.Unwrap(new Element[] { e, this.separator, Repeat.this }, new boolean[] { false, true, false }, null, null));
             }
         }

-    }
-
-    static class MaximalSequence extends Sequence.Singleton {
-        private final Element e;
-        public String toString() { return e+"@";}
-        public MaximalSequence(Element e) { super(e, null, null); this.e = e; }
-    }
-    static class Maximal extends Union {
-        public Maximal(final Element e) {
-            super(e+"+", true);
-            add(new MaximalSequence(e));
-        }
+        if (maximal) for(Sequence s : this) s.noFollow = separator==null ? e : separator;

     }
 }
     }
 }